CVE-2024-26716 usb: core: Prevent null pointer dereference in update_port_device_state

What is CVE-2024-26716?

CVE-2024-26716 is a medium-severity vulnerability in Linux kernel, published on 3 Apr 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

usb: core: Prevent null pointer dereference in update_port_device_state

Currently, the function update_port_device_state gets the usb_hub from udev->parent by calling usb_hub_to_struct_hub. However, in case the actconfig or the maxchild is 0, the usb_hub would be NULL and upon further accessing to get port_dev would result in null pointer dereference.

Fix this by introducing an if check after the usb_hub is populated.

Weakness: CWE-476

Which versions are affected by CVE-2024-26716?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-26716?

Apply the vendor's patch.

Is CVE-2024-26716 being exploited?

There is no known exploitation of CVE-2024-26716 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-26716, DEBIAN-CVE-2024-26716, GHSA-78j7-xmw6-68gr, UBUNTU-CVE-2024-26716.